Latest Post

Tuesday, 3 January 2017

Simple Code to Multiply 2 matrices of order nxn

Write a program in C# to add and multiply two matrices of order nxn.

Following is the simple C# code :

class Lab
    {
        static void Main(string[] args)
        {
            int i, j, rows, cols;
            Console.WriteLine("Enter the Number of Rows and Columns : ");
            rows = Convert.ToInt32(Console.ReadLine());
            cols = Convert.ToInt32(Console.ReadLine());
            int[,] FirstMatrix = new int[rows, cols];
            Console.WriteLine("Enter the First Matrix");
            for (i = 0; i < rows; i++)
            {
                for (j = 0; j < cols; j++)
                {
                    FirstMatrix[i, j] = Convert.ToInt32(Console.ReadLine());
                }
            }
            Console.WriteLine("First matrix is:");
            for (i = 0; i < rows; i++)
            {
                for (j = 0; j < cols; j++)
                {
                    Console.Write(FirstMatrix[i, j] + "\t");
                }
                Console.WriteLine();
            }
            int[,] SecondMatrix = new int[rows, cols];
            Console.WriteLine("Enter the Second Matrix");
            for (i = 0; i < rows; i++)
            {
                for (j = 0; j < cols; j++)
                {
                    SecondMatrix[i, j] = Convert.ToInt32(Console.ReadLine());
                }
            }
            Console.WriteLine("Second Matrix is :");
            for (i = 0; i < 2; i++)
            {
                for (j = 0; j < 2; j++)
                {
                    Console.Write(SecondMatrix[i, j] + "\t");
                }
                Console.WriteLine();
            }
            Console.WriteLine("Matrix Multiplication is :");
            int[,] MultiplicationMatrix = new int[rows, cols];
            for (i = 0; i < rows; i++)
            {
                for (j = 0; j < cols; j++)
                {
                    MultiplicationMatrix[i, j] = 0;
                    for (int k = 0; k < 2; k++)
                    {
                        MultiplicationMatrix[i, j] += FirstMatrix[i, k] * SecondMatrix[k, j];
                    }
                }
            }
            for (i = 0; i < rows; i++)
            {
                for (j = 0; j < cols; j++)
                {
                    Console.Write(MultiplicationMatrix[i, j] + "\t");
                }
                Console.WriteLine();
            }

            Console.ReadKey();

        }
    }

Output:-

Enter the Number of Rows and Columns :
2
2
Enter the First Matrix
4
5
6
7
First matrix is:
4       5
6       7
Enter the Second Matrix
4
7
9
6
Second Matrix is :
4       7
9       6
Matrix Multiplication is :
61      58
87      84


Multiplication is Possible if

No. of Columns of Matrix 1 = No of Columns of Matrix 2

Resultant Matrix Will of Dimension-

c[No. of Rows of Matrix 1][No. of Columns of Matrix 2]


Government Jobs